Automatic telegraph transmitter



9 17, 1946- 1, DE ALMEIDA 2,407,818

. AUTOMATIC TELEGRAPH TRANSIITTER Filed June a, 1944 2 sums-sum 1 HHHIIIIIIIIIIIIIIIIIIHIIHI IN VEN TOR.

By W

Games dg' p -l 1946- J. 6. DE ALMEIDA 2,407,313

AUTOIATIG TELEGRAPH TRANSMITTER Filed'Jun s, 1944 j 2 Sheets-Sheet 2 INVENTOR. IBs. 6omes de Almeuda Patented Sept. 17,1946

UNITED STATES PATENTTOFFICE AUTOMATIC TELEGRAPH TRANSMITTER J os Gomes de Almeida, Rio de Janeiro, Brazil Application June 8, 1944, Serial No. 539,238 In Brazil June 8, 1943 The present invention relate to improvements in automatic telegraph transmitters of the type in which the signals are transmitted to the line under the control of peckers which scan a perforated tape passed through the transmitter. More specifically, the invention *relates to improvements in the pecker and signal compositor mechanism of automatic telegraph transmitters of this type.

One object of the'invention is to provide a pecker mechanism of very simple and reliable construction which can be arranged in a limited space.

Another object of the invention is to provide a pecker mechanism in which the elements operated upon by the cams or eccentrics are protected by easily exchangeable wear plates.

A further object of the invention is to prow'de eccentrics to control the pecker operations, which consist of wear resisting material.

A still further object of the invention is to provide a signal compositor unit in which the transmitter lever is normally urged into contact with one of a pair of stationary contacts and can be rocked by pecker controlled transmitter bars past a dead center position into contact with the other contact of said pair.

Still another object of the invention is to combine the pecker mechanism and the signal compositor of an automatic telegraph transmitter with an upright panel on which the various elements are removably mounted in their proper mutual relationship for efficient cooperation during the working of the transmitter and for easy accessibility and exchangeability in case of fail-- ure. 7

These and other objects which will appear more clearly as the specification proceeds are accomplished, according to the present invention, by the arrangement and combination of elements set forth in the following detailed description, defined in the appended claims and illustratively exemplified in the accompanying drawings in which:

Fig. 1 is an end View of the upright panel on which the pecker mechanism and the signal compositor are mounted.

Fig. 2 is a front view of this panel, on a smaller scale, seen in the direction from the left in Fig. 1.

Fig. 3 is a rear view of the panel, on the same scale as Fig. 2 but seen from the opposite side, and

Fig. 4 is a separate, perspective view of the compositor unit.

Referring to the drawings, and first to Figs. 1

3 Claims. (Cl. 178.17)

and 2, I is a channelled table over which the perforated tape (not shown) is guided. 2 denotes a pressor arm which serves to keep the passing tape in position, and which may be raised or lowered by means of a handle 3. The table I and the pressor arm 2 are each provided with two longitudinal slots 4, shown in dotted lines in Fig. 1, the slots in the pressor arm 2 forming continuations of those in the table I. A roller 5 provided with radially projecting teeth 6 i mounted at the rear end of table I on a shaft 1 which passes through the vertical panel 8 supporting the table I (see Fig. 1). The opposite end of the shaft l which projects from the rear face of the panel 8 carried fixed thereon a comparatively large toothed wheel 9 (see Fig. 3) which may be coupled to any desired prime mover (not shown) for continuous rotation. To peckers H, curved at their upper ends, project into the slots 4 of table l for cooperation with the perforations of the tape pulled over said table by the roller 5. The peckers H are, at their lower ends, integral with horizontal pecker bars l2, projecting radially from two pecker sleeves I20 and IN. The" pecker sleeves Ho and l2d are rockably mounted side by side on a common pecker axle Ila projecting at right angles from the front face of the panel 8. Two transmitter bars I21: and no are integral with the pecker sleeves I20 and l2d, respectively, and project radially therefrom in a downward direction (see Fig. 1). Two wire springs 14, each fixed at one end to one of the horizontal mcker bar l2 (see Fig. 2) are wound around the pecker sleeves [2c and 12a. and project upwardly from said sleeves at l5, their upper ends it being curved, as shown in Fig. 2, to extend substantially parallel to the pecker bars I2. Each spring carries on its upper end a tubular sleeve ll. A bar-shaped Wear plate I9 is inserted into the free end of each sleeve l1 and is exposed through a slot l8 provided in the underside of the sleeve.

A cam shaft l3 passes through a bushing 2| traversing the panel 8, one end of said cam shaft projecting from the front face of the panel between the pecker bars [2 and the sleeves", and its opposite end projecting from the rear face of the panel 8 and having fixed thereon a pinion 22 in mesh with the toothed Wheel 9. Two eccentrics 20 made of wear-resisting fibrous material are fixed on the front end of cam shaft 13, each eccentric Z0 cooperatin with one pecker bar 12 to prevent it normally from rocking upwardly and with the corresponding sleeve l! to maintain this sleeve andthe spring connected thereto normally in a position in which it urges the pecker bar I 2 upwardly against the eccentric 20.

Each pecker bar I2 passes through a holder 23 supporting a bar-shaped easily removable wear plate 23a, and the eccentric act directly on the wear plates l9 and 23a which can be easily replaced whenever necessary, so that the life of the springs and pecker bars I2 is infinitely prolonged.

The signal compositor unit comprises a horizontal shelf 24 mounted on the panel 8 and projecting from the front face thereof below the pecker sleeves I2c, I2d with its center line disposed in a vertical center plane parallel to and to one side of the pecker axle Ila. 24 has at its outer edge 25 two projecting lugs between which a rocking shaft 26 is mounted; A rocking pin 21 projects radially upwardly from the shaft 26. Two contact posts 28, 29; are mounted on the shelf 24 on opposite sides-of the center plane, and are provided near their tops with two small radially projecting contacts 30 facing each other. A thin spring blade extends from the top of rocking pin 21 to the adjacent end 33 of a transmission lever 32, which end 33 is formed as a contact for cooperation with the contacts 30 on the contact posts 28, 29. A spring 34 secured at one end to the rocking in 27 and at its opposite end to a stationary pin 35 projecting upwardly from the shelf 24 serves to urge the rocking pin 27 toward the transmission lever 32, thus causing the head of pin 2'! to bear against the blade 35. A disc 36 disposed on the shelf 24 carries a fixed bracket 31 including a horizontal arm which is traversed by a screw 38. The axle 3B of the transmission lever 32 is pivoted between the disc 35 and the screw 33 for rocking movements about an axis located in the intersection of the center plane of said shelf 24 with a second vertical plane extending parallel to the face of panel 8 between the two transmitter bars 12a and I211. The lower ends of the transmitter bars act upon the arms of the transmitter lever 32 on opposite sides of the pivot axis, to rock the transmitter lever towards contact posts 28 or 29. It will be clear that rocking of the pecker sleeve I20 in clockwise direction, which occurs under the influence of the associated spring when the corresponding pecker bar i2 and pecker iI are freed by the corresponding eccentric 25 at a time when a suitable perforation in the tape permits this pecker to rise, will cause the contact 33 on the transmitter lever 32 to touch contact 3!) on contact post 28. When the transmitter bar I20 is returned by the associated eccentric to its original position, the rocking pin 21 acting under the influence of spring 34 on the blade 3I holds the lever 32 pressed against contact post 28 until a subsequent clockwise rocking of pecker sleeve I 2d causes the transmitter bar I2b to strike against the other arm of transmitter lever 32, thus forcing the same past its dead center position towards the other contact post 29. The shelf 24 is mounted in the panel 8 by means of two short pins 40 and a long locking pin 4| with a locking head 4Ia, all projecting from the inner edge of the shelf 24 into suitable holes provided in the panel 8.

Three contact blades 42, 43 and 44 connected through insulated conductors passing through the shelf 24 to the contact posts 28, 29 and the disc 33, respectively, are secured by means of nuts 45 to the underside of shelf 24, the three blades The shelf being aligned with one another and making electrical contact with three terminals 45 projecting at right angles from the front face of panel 8.

Iclaim:

1. In an automatic telegraph transmitter, a tape support over which tape can be Passed in a predetermined tape plane, a pecker axle ex tending parallel to said tape plane, two pecker sleeves rotatable on said pecker axle, two pecker bars projecting radially from said two pecker sleeves, respectively, substantially in a plane parallel to said tape plane, two peckers, integral with the free ends of said pecker bars, respectively, and projecting at right angles from the latter toward said tape plane, a cam shaft extending parallel to said pecker axle adjacent to and transversely of said pecker bars, two eccentrics fixed on said cam shaft for cooperation with said two pecker bars, respectively, said eccentrics being shaped to' prevent normally rocking movements of said pecker bars and peckers towards said tape plane and to permit rocking of each pecker bar and pecker towards said tape plane for a fraction of each revolution of the cam shaft, two wire springs, each having one end thereof supported on one of said eccentrices and being wound around said pecker axle with the opposite end of each spring actin on the corresponding pecker bar to urge the same against the associated eccentric, two substantially parallel transmitter bars integral with said pecker sleeves and projecting radially therefrom,

and a transmitter lever disposed adjacent the.

free ends of said transmitter bars, said transmitter lever being rockable on an axis in a plane extending between said transmitter bars at right angles to said pecker axle. 1 I ,2. In an automatic telegraph transmitter, a signal compositor comprising a support plate, two lugs projecting from one edge of said plate, a rocking shaft mounted between said lugs, a pin projecting radially from said rocking shaft substantially centrally thereof, a spring between-a fixed point on said support plate. and said pin,

' a pivot member supported on said plate at right angles thereto with its axis disposed in a central plane containing the axis of said pin, a transe mitter lever carried by said pivot member parallel to said plate and having an arm extending from said pivot axis towards said pin, a spring blade connecting the head of said pin with the ad- J'acent end of said transmitter lever, two contact posts'on opposite sides of the transmitter lever, and pecker controlled transmitter bars to rock said transmitter lever back and forth past its dead center position from a position in which it is urged against one of said contact posts into a position in which it is urged against the other contact post and vice versa.

3. In an automatic telegraph transmitter, an upstanding panel, a horizontal pecker axle projecting from said panel, two pecker sleeves loose on said pecker axle, two substantially parallel and horizontal pecker bars projecting radially from said two pecker sleeves, respectively, two peckers integral with the free ends of said pecker bars and projecting upwardly therefrom, a rotatable cam shaft projecting at right angles from said panel at a level slightly above said axle and transversely of said pecker bars, two eccentrics fixed on said cam shaft for cooperation With said two pecker bars, respectively, said eccentrics being shaped to prevent normally upward rocking of said pecker bars and peckers and to permit upward rocking of each pecker bar and pecker for a fraction of each revolution of the associated eccentric, two wire springs, each having one end thereof supported on the top of one of said eccentrics and being wound around said pecker axle with its other end acting on the corresponding pecker bar to urge the same normally upwardly, a horizontal shelf mounted on said panel below said pecker sleeves with its center line disposed in a vertical center plane extending at right angles to said panel and near said pecker axle at one side of the latter, said shelf having at'its outer edge two outwardly projecting spaced lugs, a rocking shaft mounted between said lugs, a, rocking pin projecting radially upwardly from said rocking shaft in said center plane, an element projecting upwardly from said shelf in said center plane at a distance from said outer edge, a spring between said rocking pin and said projecting element to urge said rockin pin towards said panel, a pivot member supported on said shelf for pivotal movement about a vertical axis located at the intersection of said center plane with a vertical plane extending parallel to the face of said panel between said pecker bars, a transmitter lever carried by said pivot member parallel to said shelf and having two arms extending from said pivot aXis towards the outer and the inner edge of said shelf, respectively, a spring blade connecting the head of said rocking pin with the adjacent end of said transmitter lever, two contact posts projecting upwardly from said shelf at equal distances from the outer edge thereof and on opposite sides of said transmitter lever, and two substantially parallel transmitter bars projecting radially downwardly from said two pecker sleeves, respectively, to act with their free ends on the two arms, respectively, of said transmitter lever.

JOSE GOMES 1m ALMEIDsA. 

